He____know the answer, but I’m not sure.
A.maybe B.may be C.may D.must
My sister____Beijing tomorrow. She works there.
A.leaves B. is leaving for C.leaves for D. is leaving
-My mother is ill in hospital.
——_______.
A.That’s OK B. All right C.Thank you D.I’m sorry to hear that.
We can use QQ to talk with each other online.
--Good! Will you please show me ______it?
A.what to use B.how to use C.when to use D.where to use
My mother often spends 2 hours ______ housework every day.
A.do B.does C.doing D.to do
— Must I come at four o’clock?
— Oh, no, you ____.
A. don’t B. mustn’t C. don’t have to D. can’t
